40517819 has 2 divisors, whose sum is σ = 40517820. Its totient is φ = 40517818.

The previous prime is 40517809. The next prime is 40517821. The reversal of 40517819 is 91871504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40517819 - 2⁸ = 40517563 is a prime.

It is a super-2 number, since 2×40517819² = 3283387313033522, which contains 22 as substring.

Together with 40517821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40517809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20258909 + 20258910.

It is an arithmetic number, because the mean of its divisors is an integer number (20258910).

Almost surely, 2^40517819 is an apocalyptic number.

40517819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40517819 is an equidigital number, since it uses as much as digits as its factorization.

40517819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 40517819 is about 6365.3608695816. The cubic root of 40517819 is about 343.4646299816.

The spelling of 40517819 in words is "forty million, five hundred seventeen thousand, eight hundred nineteen".